png_do_write_invert_alpha 198 third_party/libpng/pngusr.h #define png_do_write_invert_alpha wk_png_do_write_invert_alpha png_do_write_invert_alpha 433 third_party/libpng/pngwtran.c png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)